Explain why frictional force is said to be a contact force?
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frictional forces said to be a contact force because it acts upon two surfaces which are in contact with each other like when a car is moving on a road then it acts between the tyres of the car and the road because the tires and the road surface are in contact with each other
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Because frictional force oppose the motion of an object so it is said to be contact force
Ck1234:
Frictional forces are called contact forces because - they opposes the motion of a body and to oppose the motion a contact between them must be there.
Secondly- they acts upon two surfaces . So a contact between them must be there.
For Ex- it is the frictional force which allows us to walk or move and while walking there are two surfaces in contact I.e.oue foot and the ground.
Another Ex- when we roll a ball after sometimes it stop because of friction and there are also two surfaces in contact I.e ball and the ground which opposes it's motion .
Hope it helps you !!☺☺
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